Setup the default root window and added the beginnings of the Event class.
Added GetType method to Event and also Enter/LeaveWindow_Event classes.
Added pure virtual Poll/WaitForNextEvent methods to EventGenerator.
Added the X11XCB EventGenerator, WindowManipulator, and Drawer interfaces to X11XCB_DisplayServer.hpp.
Added storage for X related client data and basically implemented X11XCB_EventGenerator.
Added some very basic event handling to Default_WindowManager.
Get rid of obsolete classes.
Remove event directory from CMake.  No need for it now.